Comments about Meguiars Meguiar's Hard Water Spot Remover:
I used this product on my 10 year old pontoon which had built-on hard water spots which I have never been able to effectively remove. I was stunned! I had done one side of the boat with vinegar & water and elbow grease and then wax and then used this on the other side - spray on and wipe off. This is it! This is the product to easily keep hard water spots off your boat! I am thrilled to have found it!